I think I heard that pinching nerve clusters where the neck meets the shoulder actually can briefly render a person unconscious. Vulcans just have the physical strength to administer it like it's nothing. Data used it on several occasions. And Picard used it once (on a character played by Tim Russ ironically), although with extra effort than most Vulcans.

And Seven of Nine used it on Tuvok.

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"Geniuses are like thunderstorms. They go against the wind, terrify people, cleanse the air." ~ Søren Kierkegaard